It may not look like much more than a postcard with a hole in the middle.But the work by John Lennon’s widow Yoko Ono is one of 50 pieces of artwork selected for a special exhibition depicting beauty.Beholder is a collection that is being brought together under one roof at the Talbot Rice Gallery at Edinburgh University until February and features unique interpretations on what is considered beautiful.The idea came from the gallery’s principal curator Pat Fisher, who wanted to do something to mark the 300th anniversary of the birth of philosopher David Hume, who had very specific ideas about the perception of beauty.Ms Fisher wrote to colleagues in galleries across Scotland inviting them to suggest their own ideas for pieces that would fit the bill, with the result being a vast range of items from across the world, including Ono’s A Hole To See The Sky Through, which was selected by Kate Gray of the Collective Gallery in Edinburgh.